Non-Silver Item: 23.19ct Certified Natural Welo Opal Cabochon
Loose Gemstone (Unmounted Jewelry Component) · Natural origin; certified by a third-party gemological authority (apparent in the auction listing's 'Cert.' disclaimer). Historically, Welo opals are sourced from the Amhara Province of Ethiopia.
Pattern: Welo Opal; specific pattern is 'Honeycomb' or 'Broad Flash' play-of-color, categorized by its unique hydropane properties.
Type
Loose Gemstone (Unmounted Jewelry Component)
Maker
Natural origin; certified by a third-party gemological authority (apparent in the auction listing's 'Cert.' disclaimer). Historically, Welo opals are sourced from the Amhara Province of Ethiopia.
Material
Natural Hydropane Opal (Hydrated Silica). Chemical Formula: SiO2·nH2O. Not a silver item.
Dimensions
Weight: 23.19 carats. Dimensions would typically be approximately 20-25mm in length based on carat weight for a high-dome cabochon.
Description
An exceptional 23.19ct natural Welo opal featuring a vibrant, multi-color fire. The stone exhibits a high-dome cabochon cut that maximizes the 'rolling' flash effect of the internal silica spheres. The translucent-to-white body tone provides a bright canvas for the intense warm-tone flashes.
Key Features
Extraordinary size (23ct+), high dome, intense neon orange/red flecks, and hydropane transparency.
Material & Composition
Natural Hydropane Opal (Hydrated Silica). Chemical Formula: SiO2·nH2O. Not a silver item.
Finish & Decoration
High-dome cabochon cut with a high-gloss polish; features intense play-of-color including orange, green, and blue spectral hues.
Hallmarks & Stamps
None. As a gemstone, it lacks silver marks. Identity is verified via 'Cert.' (Certificate) appearing in the auction text.
Construction Details
Naturally formed mineraloid; lapidary-cut and polished from rough gemstone material.
Functional Features
Optically active; 'Hydropane' feature allows for water absorption and temporary change in transparency.
Handle & Grip Details
None; loose stone intended for setting in a pendant, ring, or brooch mount.
Craftsmanship Details
Master-level lapidary work; the symmetry of the dome and polish quality indicate high-end professional finishing.
Authentication Indicators
The presence of a laboratory certificate (Cert.) mentioned in the lot title; visible play-of-color patterns specific to Ethiopian volcanic opals.
Origin & Manufacturing
Ethiopia (Welo region), likely processed and polished in a modern lapidary workshop.
Era & Period
Contemporary/Modern (Ethiopian Welo opals were primarily discovered in 2008).
Age Estimate
Produced within the last 15 years (2008–present).
Cultural Significance
Opals are October's birthstone and have historically symbolized hope and purity; Ethiopian opals have disrupted the Australian monopoly on the market since the late 2000s.
Condition Notes
Appears in excellent condition with no visible crazing, cracks, or surface abrasions in the auction photography. Level: Excellent/Gem Quality.
Value Estimate
Direct auction listing value: $34,785 (per screen shot). Market value for top-tier Ethiopian opal ranges from $100 to $1,500+ per carat depending on fire intensity.
Care & Maintenance
Avoid contact with water, perfumes, and oils (due to hydropane nature). Store in a cool place away from direct sunlight to prevent drying or 'crazing.'
Similar Pieces
Australian White Opal (denser, not hydropane); Mexican Fire Opal (often clear orange without play-of-color).
Interesting Facts
Welo opals are 'Hydropane,' meaning they can absorb water and become temporarily transparent, returning to their original opacity when dry.